<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>首页</title>
    <script>
        // 页面访问拦截
        let flag = sessionStorage.getItem('flag')
        if (!flag) {
            location.href = './login.html'
        }
    </script>
</head>

<body>
    首页
</body>

</html>